121221011203321 has 8 divisors (see below), whose sum is σ = 121255301327688. Its totient is φ = 121186725504000.

The previous prime is 121221011203207. The next prime is 121221011203339. The reversal of 121221011203321 is 123302110122121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42258593436921 + 78962417766400 = 6500661^2 + 8886080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121221011203321 - 2¹¹ = 121221011201273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121221011203292 and 121221011203301.

It is not an unprimeable number, because it can be changed into a prime (121221011203121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54078711 + ... + 56275651.

It is an arithmetic number, because the mean of its divisors is an integer number (15156912665961).

Almost surely, 2^{121221011203321} is an apocalyptic number.

It is an amenable number.

121221011203321 is a deficient number, since it is larger than the sum of its proper divisors (34290124367).

121221011203321 is a wasteful number, since it uses less digits than its factorization.

121221011203321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212523.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121221011203321 its reverse (123302110122121), we get a palindrome (244523121325442).

The spelling of 121221011203321 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, eleven million, two hundred three thousand, three hundred twenty-one".